Optimum Nutrition Serious Mass is a high-calorie weight gainer and muscle-building protein powder designed for anyone looking to increase body mass and enhance muscle recovery. Each serving delivers 1,250 calories and 50 grams of protein, along with 252 grams of carbohydrates, making it the perfect post-workout or between-meal shake for serious muscle growth.

Packed with 25 essential vitamins and minerals, plus creatine, L-glutamine, glutamine peptides, choline, inositol, and amino acids, Serious Mass supports muscle repair, immune health, and overall wellness. Its delicious chocolate flavor and instantized formula make it easy to mix and consume, even for those with busy lifestyles or high-calorie needs.

Whether you have a fast metabolism, small appetite, or active schedule, Serious Mass provides the extra calories and nutrients needed to gain weight healthily and efficiently. Trusted by athletes and fitness enthusiasts worldwide, this premium weight gainer helps you build lean muscle, boost energy, and achieve your physique goals.

Key Highlights:

• 50g protein per serving for muscle growth and recovery

• 1,250 calories per serving (up to 1,640 calories with low-fat milk)

• 252g carbohydrate complex for energy and size

• 25 vitamins & minerals for overall health

• Contains creatine, glutamine, and essential amino acids

• Delicious chocolate flavor with natural and artificial flavors

• Suitable for high-calorie diets and active lifestyles

Take your muscle-building journey to the next level with Optimum Nutrition Serious Mass – the ultimate weight gainer protein supplement.